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Finding the Fourth Proportional to 436.86, 655.20 and 205.65

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Solution

The fourth proportional to 436.86, 655.20 and 205.65 is: 308.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.86 : 655.20 = 205.65 : x
  2. Step 2: Convert to fraction form
    436.86/655.20 = 205.65/x
  3. Step 3: Cross multiply
    436.86x = 655.20 × 205.65
  4. Step 4: Simplify right side
    436.86x = 134,741.88
  5. Step 5: Solve for x
    x = 134,741.88/436.86
  6. Step 6: Final answer
    x = 308.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.